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Medical Definition of Coccidia of chickens
1. Eimeria tenella, a species producing caecal coccidiosis of young chicks; Eimeria necatrix, producing severe disease in the small intestine and ceca; Eimeria acervulina, Eimeria hagani, and Eimeria praecox, which localise in the duodenum; Eimeria mitis localises in the small intestine, Eimeria brunetti in the lower small intestine and rectum, and Eimeria maxima in the lower small intestine. Synonym: coccidia of chickens. (05 Mar 2000)